Chemical Reactions_GG Science

Front

What are the signs that a chemical reaction has occurred?

Back

Color change, Odor change, Properties change, All of the above.

Front

What is a catalyst?

Back

A substance that helps a chemical reaction happen faster without being consumed in the process.

Front

Is TNT exploding a physical or chemical change?

Back

Chemical change.

Front

What is a molecule?

Back

A molecule is made of more than one atom.

Front

What are properties of matter?

Back

Magnetism, Color, Odor, All of the above.

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products).

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What role do reactants play in a chemical reaction?

Back

Reactants are the starting substances that undergo change during a chemical reaction.